<template>
	<view class="goods_detail_container" v-if="goods_info.goods_name">
		<!-- 轮播图区域 -->
		<swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
			<swiper-item v-for="(item, i) in goods_info.pics" :key="i">
				<image :src="item.pics_big" @click="preview(i)"></image>
			</swiper-item>
		</swiper>
		
		<!-- 商品信息区域 -->
		<view class="goods-info-box">
			<!-- 商品价格 -->
				<view class="price">¥{{goods_info.goods_price}}</view>
			<!-- 商品信息主体区域 -->
			<view class="goods-info-body">
				<!-- 商品名字 -->
				<view class="goods_name">{{goods_info.goods_name}}</view>
				<!-- 收藏 -->
				<view class="favi">
					<uni-icons type="star" size="18" color="gray"></uni-icons>
					<text>收藏</text>
				</view>
			</view>
			<!-- 运费 -->
			<view class="yf">快递：免运费</view>
		</view>
		
		<!-- 图文区域 -->
		<rich-text :nodes="goods_info.goods_introduce"></rich-text>
		
		<!-- 商品导航组件区域 -->
		<view class="goods_nav">
		<uni-goods-nav :fill="true"  :options="options" :buttonGroup="buttonGroup"  @click="onClick" @buttonClick="buttonClick" />
		</view>
	</view>
</template>

<script>
	// 按需映射导入辅助方法s， 导入mapMutations辅助方法
	import { mapState, mapMutations, mapGetters } from 'vuex'
	
	export default {
		// 计算属性节点
		computed: {
			// ...展开运算符 展开
			...mapState('m_cart', ['cart']),
			//把 m_cart模块中名称为 total的 getter映射到当前页面中使用
			...mapGetters('m_cart', ['total']),
		},
		
		// 监听器
		watch: {
			// 1.监听tota1值的变化,通过第一个形参得到变化后的新值
			// total(newValue) {
			// 	// 2.通过数组的find()方法,找到购物车按细的配置对象
			// 	const findResult = this.options.find(x => x.text === '购物车')
			// 	if (findResult) {
			// 		// 3.动态为购物车按钮的info属性照值
			// 		findResult.info = newValue
			// 	}
			// },
			
			total: {
				// handler属性用来定义侦听器的 function处理函数
				handler(newValue) {
					const findResult = this.options.find(x => x.text === '购物车')
					if (findResult) {
						// 3.动态为购物车按钮的info属性照值
						findResult.info = newValue
					}
				},
				// immediate属性用来声明此侦听器,是否在页面初次加载完毕后立即调用
				immediate: true
			}
		},
		
		
		data() {
			return {
				goods_info: {},
				options: [{
				            icon: 'shop',
				            text: '店铺',
				            infoBackgroundColor:'#007aff',
				            infoColor:"red"
				        }, {
				            icon: 'cart',
				            text: '购物车',
				            info: 0
				        }],
				        buttonGroup: [{
				          text: '加入购物车',
				          backgroundColor: '#ff0000',
				          color: '#fff'
				        },
				        {
				          text: '立即购买',
				          backgroundColor: '#ffa200',
				          color: '#fff'
				        }
				        ]
			};
		},
		onLoad(options) {
			const goods_id = options.goods_id
			this.getGoodsDetail(goods_id)
		},
		methods: {
			//把 m_cart模块中的 addToCart方法映射到当前页面使用
			...mapMutations('m_cart', ['addToCart']),
			
		 	async getGoodsDetail(goods_id) {
				const {data: res} = await uni.$http.get('/api/public/v1/goods/detail', {goods_id})
				if (res.meta.status !== 200) return uni.$showMsg()
				// 替换 为img添加行内style样式，解决图片底部空白间隙问题
				res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ').replace(/webp/g, 'jpg')
				this.goods_info = res.message
			},
			// 轮播图预览效果
			preview(i) {
				uni.previewImage({
					current: i, //索引
					// 所有图片url地址的数组
					urls: this.goods_info.pics.map(item => item.pics_big)
				})
			},
			
			onClick(e) {
				if (e.content.text === '购物车') {
					uni.switchTab({
						url: '/pages/cart/cart'
					})
				}
			},
			
			buttonClick(e) {
				if (e.content.text === '加入购物车') {
					// 组织商品的信息对象
					// {goods_id, goods_name, goods_price, goods_count, goods_small_logo, goods_state }	
					const goods = {
						goods_id: this.goods_info.goods_id,
						goods_name: this.goods_info.goods_name,
						goods_price: this.goods_info.goods_price,
						goods_count: 1,
						goods_small_logo: this.goods_info.goods_small_logo,
						goods_state: true
					}
					
					// 调用addToCart方法
					this.addToCart(goods)
				}
			}
		}
	}
</script>

<style lang="scss">
swiper {
	height: 550rpx;
	
	image {
		width: 100%;
		height: 100%;
	}
}

.goods-info-box {
	// padding: 10px;
	padding-left: 10px;
	// padding-right: 0;
	
	.price {
		color: #C00000;
		font-size: 18px;
		margin: 10px 0;
	}
	
	.goods-info-body {
		display: flex;
		justify-content:  space-between;
		
		.goods_name {
			font-size: 13px;
			margin-right: 10px;
		}
		.favi {
			color: gray;
			width: 120px;
			font-size: 12px;
			display: flex;
			flex-direction: column; 
			align-items: center;
			justify-content: center; //纵向居中
			
			border-left: 1px solid #efefef;
		}
	}
	
	.yf {
		font-size: 12px;
		color: gray;
		margin: 10px 0;
	}
}

.goods_nav {
	position: fixed;
	bottom: 0;
	left: 0;
	width: 100%;
	z-index: 999;
}

.goods_detail_container {
	padding-bottom: 50px;
}
</style>
